Heel trimming machine



Filed Aug. 16. 1929 '7 Sheets-Sheet 1 mw J Y wm e a. w@ *o M Q Y n s S.. a Q ,E ,n BQ

Feb. 28, 1933. M. s. GATE HEEL TRIMMING MACHINE '7 Sheets-Sheet anni Filed Aug. 16 1929 #Swim ,LIL

Y [Niven/071' Afa/Cohn Gor/Z312.

s Nel Feb. 28, 1933;

M. S. CATE HEEL TRIMMING MACHINE Filed Aug. 16 1929 7 Sheets-Sheet 3 y "QI 1,

Feb. 28, 1933.

M. s. GATE Y HEEL TRIMMING MACHINE 4 S Sms @EQ Feb. 28, 1933. M 5. ATE

HEEL TRIMMING MACHINE Filed Aug. 16 19.29

'7 Sheets-Sheet 5 28, 193.3. M, 5. GATE HEEL TRIMMING MACHINE '7 Sheets-Sheet 6 Fired Aug. 1e, 1929 Feb. 2,8, 1933. M 5 GATE HEEL TRIMMING MACHINE Filed Aug. 1e, 1929 7 Sheets-Sheet 7 wmwk wm @j d @mmm wm M MNR* Q .E @WWK m m \Q\ M, 8 NW m Patented Feb.` 28, 1933 unir sr PATENT oFFicE i/rAnooiiiii` s. GATE, or WALTHAM, MASSACHUSETTS, AssiGNoit BY MESNE ASSIGN- MENTS, TO HOCH)l RUBBER COMPANY, INC., GF

l roitA'rIoN or DELAWARE WiLMINGroN, nEI..AvsrAmi,v Av oonrriinn TRIMMING MACHINE Application led August 16, 1929; SerialNo. 386,389.

This invention relates to a machine for trimming the edges of rubber Vheels for boots In the molding of rubber heels the excess rubber in themold flows outl at the top and bottom and forms a lin on the top and another on the bottom of the heel being molded. f

It is the object of this invention to provide a machine which will automatically trim the n oft' of the lower edge of the heel and also off ofthe upper edge of the heel.

It is further an object of the invention to provide a machine in` which the heels` are automatically fed into the machine to a vwork support on a carrier, which, in the embodiment of my invention hereinafter set forth, is a rotary carrier. This carrier is intermittently rotated to carry the heel, rs't, to a pair of rotary cutters which trim the iin off,

of the bottom edge of the breast of the heel while the carrier is continuing its rotation,

and second, the heel is carried to a second pair of rotary? cutters wherev the fin is trimmed o the opposite sides of the heel and olf of the circular rear edge thereof. The intermittent motion of the carrier renders it possible for the heel to be rotated while the carrier stands still. The heel is thenicarried to'another pair of cutters which trim the fin from the upper edge of the breast, and finally is carried to another pair of cutters which trim the iin from the sides and rear portion of the upper edge of the heel. The carrier then carries the heel to a device which ejects the flieel from themachine and finally the carrier returns to its initial position in readiness to receive another heel. The car rier has a plurality of arms whereby a plurality of heels may be trimmed at the same To these ends the invention consists in a y heel trimming 'machine ofY the character set when the circular rear being trimmed.

portion thereof is Fig.3 is a frontelevation of the mechaj i I isa side elevation viewedinthe direction of the arrow a, Fig. 6, illustrating the work support and the means whereby the heel is clamped tothe workjsupport, to#V gether with a portion of the carrier, a kportion of a heel being shown in section clamped to the work support and a portionl of acam also shown in section. f j i t Fig. 8 is a detail side elevation viewed in the direction of the arrow b,` Fig. 6, illustratiiig a locking arm for holding the carrier `in a stationary position while the heel is being positioned thereon. i y f Fig. 9 is an yelevation of the first pair of, cutters and the mechanism for rotating-them, viewed inthe direction ofthe arrow c, Fig.

l, with a portion of the heel'which is being trimmed shown in section and also a portior of the bed of themachine, the Work supe for imparting rotary motion tothe cutters,

viewed inthe direction of the' arrow d, Fig. 9.A

Fig. `12 is a side elevation of the cutting mechanism of the" second set of cutters,

viewed in the direction of thearrow e, Fig. 1,'

the mechanism being similar to the mechanism illustrated in Fig. 9, except that agportion of the mechanism forrotating thework support and theheel thereon is illustrated.y

Fig. 1,3 is a sectional plan taken'onyline'` 13-13, Fig. l2, illustrating for rotating the work support.

the mechanism is fed into and passes vthrough the mach-ine.r

Fig. 14 is a side elevation of the third set of cutters, viewed in the direction of the arrow f, Fig. 1, this view being similar to the view of the cutters illustrated in Fig. 9, except that the cutters are inclined at a different angleto the tread ofthe-heel whereby the iin may be trimmed from the upperl edge of the heel,whereas in Figs. 9 and 12 the'in is illustrated as being trimmed from the lower edge of the heel.

Fig. 15 is a detail elevation partly in section as viewed from the front of the machine, illustrating the ratchet and pawl mechanism for imparting' an intermittent rotary movement to the carrier.

' Fig. 16 is a detail sectional elevation taken on line 16-16, Fig. 7 illustrating the latch for holding the presser foot in position prior to "clamping the heel to the work support.

Y Fig. 17 is a diagrammatic plan view illustrating the difere'nt positions of a heel as it Fig. 18 is a side elevation and Fig. 19 an f end elevationfof a modified pair of cutters.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, the heels 2O with the Afins Y 21 and 22 thereon are piled in a stack as illustrated in Fig. 3 and are held in stack formai tion by vertical rods, or other suitable means not shown in the drawings but well known to those skilled in the art.

The' lowermost heel 23 is shown in the .drawings asfresting upon a right-angled plate 24 which is fastened to a bracket 25 which isfastened to a feed slide 26, see. Figs.

'3 and 4. Immediately at the rear of the heel 23vv is a pusher finger 27 and this is supported l upon a slide 28 which is mounted to slide on 40" ball bearings 29 in the bracket 25. Another plate 30 projects rearwardly from the stack of heels and is also fastened to thek bracket 25. Thus it will be seen that by imparting a reciprocate-ry motion to the slide 26, the pusher finger 27 will be moved forwardly together with the plates 24 and `30 so that the lowermost heel 23 will be pushed out from beneath the othery heels -in the-stack and Y, Y, the heel 23 carried forward into the machine 50l tovbe placed on the work -support as hereinafter described. r When the slide 26 together with the bracket i -returns after'delivering the heel Y. to the machine to 'theposition illustrated in Fig. 3, the stack of heels 20 will drop when the plate 3 Ois moved to the extreme left and will then rest yupon the plate 24, as illustrated in Fig. 3. Thepusher being supported upon or fastened to the slide 28, which can slide laterally of the bracket 25, allows the heel 23 when fed into the mach-ine to be centered between two vguides and correctly positionedwith relation to the heel support and presser foot'.

The slide 26 is sl'idably mounted in ways 31 provided in a frame 32 and has a reciprocais imparted by a segment gear 40 (Figs. 1 and 6) formed upon the outer end of a lever 41 which is pivotally mounted at 42 in the frame of the machine and has a. rocking motion impartedv thereto by a link 43 pivoted at one end at 44 tothe lever 41 and at the other end to a crank pin 45 fast to a` cam 46. The cam 46 is fastto a vertical .shaft 47 and is driven by a pulley, gear, or other suitable mechanism not shown in the drawings.

The left hand end of the auxiliary slide V33 terminates in a cylindrical extension48 which has nuts 49 in screw-threaded engagement therewith, and interposed between said nutsY c anda vplate 50 isa spring 51, the plate 50 being fastened to the slide 26. Thus a reciprocatory motion can be imparted to the rack slide 33 and through the vspr-ing 51 and nuts 49 and extension 48 to the slide 26 can bek moved forwardly with a yielding pressure.

The heel 23 is fed forward over a work support 52 and beneath a presser foot 53 in a manner hereinbefore setforth, and is positioned relatively to the work support 52 and presser foot 53 by a pair of guide plates 54 and 55 which have inclined guiding faces 56 and 57, see Figs. 1 and 6. These guide plates 54 and 55 are adjustable toward and away from each other to accommodate different i sized orshaped heels and are slidably mount.- ed in a bracket 58 which is fastened to the top of the frame-32, see Figs. 3 and 6. The

tween the `arm 63 and the nut 67, yso thatv by turning the handle 64 in lthe proper direction the` arm 63 can be clamped to the plate 66 or unclamped therefrom and conse- I quently, kthe pinion 61 can be locked in position, thus locking the guide plates54 and 55 in any desired adjusted position.

Vhen the heel 23 is fed forward between the work support 52 and vthe presser foot 53, it is positioned as to further forward movement by the guide plates 54 and 55 which bear against opposite sides thereof, and it is also positioned yand-'held against said guides during the first portion of the retracting moveessere 'ment of theeed` sli-'des 2e. and 33 by a finger' 68, see Figs.` 1, 3,v 4 and `This' finger is mounted to rock upon a ro'd'r69`I which. is falstenedat onel endto a bracket 70,- which `in turn is fastened toi theframe 32. HThe rodl 69l at its left hand end, Fig..6, is provided with a'collar 71 into which one end 72 of a i.: heldin elevated positionso that the heel`23 when being fed yforward to they machine passes thereunder and they said linger is held inl-elevated positionV by a ball'75'which restsY i upon a cam-shaped plate`76,-see Figs. 3,24

' and 6. This cam-shaped plate is stationary and is fastenedY t' o the bracket 70; rI he finger 68' is prevented from niovingtoward the right, Figs. 3 ,and 6,V by a stop lever 77 which is pivoted at 78 to the bracket 70 and has a downwardly projecting arm7 9 and a horizontally extending arm 80, the horizontally' extending arm 80 having a notch 81 in its free end which engages a portion 82 of the block 74 and thus prevents the'inger 68 from being moved t'owardtheV right, from the position illustrated in Fig. 3,- until the heel 23 has been fed in "the i manner herein'before described by the pusher finger 27 and plate 294 to' a position beyond the finger 68l or 'at theright thereof, Fig; 3whereupon the lever i's rocked on its pivot in the direction of the' arrow g by a stud 83 fast to the slide 33 and projecting laterally thereof into the path of theflower end of the arm`7 9' so 'as toI engage thesame', and rocking thelever 77 in the direction of the arrow git will be seen that the block 74 and the finger 68-fastthereto will be freedfromthe arm 80 of the locking lever 77 and thus the finger4 68 will be allowed to be forced toward the right, Figs?)v and 6, by the spring 73. Atthe same time the finger 68 and the block 74 willbefrocked in the direction of the arrow h, F ig.`4, by the A torsional action of the spring 73and thus bring the finger 68 downwardly until its hook-shaped outer end 84 projects into the recess 85 in the pusher finger 27 and: engages the breast portion ofthe heel 23ho'ldin'g the `heel 23 in between the guide plates 54 and 55. Now .the heel is correctly positioned relative# y to the'work'supportl 52 :and the-presser The slides 33 and 26V areV nowinv readiness to move toward the left7 Fig. 3, which is done rockedto secure this end.y The plate 24 will therefore be `withdrawn fromV beneath the heel:.23` leaving theV heel gripped betweenthe guide plates 54an'd 55 and the finger .68'antf at this time the presser foot 53 will descend,. as hereinafter described, and grip the heet 23:

between it and the work support.y On the returnfmoveme'nt of the slides33 and 26 aitooth-Q l shaped' plate186, which is fastened to the slide" 7 33, see Figs. 3 and 4,` engagesthe` toothI 87,@ l which projects downwardly from'fthegblock 74, and pushes the block 74 backwardly to-V gether with the finger 68. As the block, 74"` and the finger 68 are thuslpushed backwardA ly or toward the left,-Fig`. v*6,theball 7 5 on thes block 74 will ride up on'the inclined upperV edge 7 6 of the cam 76 and thus tip the bloekl 74 andV linger 68 i-nto the elevated position illustratedr in Fig. 4, thuscausing the tooth.

87 to pass out of engagement with-the plate 86` and at the same time the horizontal,arm-l 80 ofthe lever 77 will move `upwardly and.

will engage the block 74 locking vit against@ movement toward the right, Fig. '3, Vas illus` trated in Fig. 3, the said lever 77 being moved. i, upwardly to lock the finger 68 in its retracted-v position bya coil torsional spring 88. Thework support 52 is rotatably mounted in a bearing 89on the outer end of an` arm 90, see F lig. 7. To thelower end of theworlrsupport 52 is rfastened an arm 90', see Figs.-7, 12 and 13, and on the outer end' of thearmf 90 is a roll 91 rotatably mounted on apin 92 in saidv arm. The'arm 90 is flattedoff; at93 and has a ytooth 94 projecting fromv its outer end'.- I

There are three arms 90, 95 and 96 anda work support 52 is rotatably mountedon the outerl end of each of thesearms. The larms 90, 95' and' 96 project radially from` al'hub 97,

Figs. 1 and 15. This hub is rotatably mount.-

j against a ratchet 106 which is fastened to' thehub -97 of the `carrier 1,07, Vsaid carrierconsisting of arms V90, 95 and l96 and the hub, 97. A segmental gear 188,as hereinafter described, will impart a rock-ing movement to the gear 101 and thus a rocking movement will be imparted to the arm 102, andthe pawl 103 engaging teeth on the ratchet 106 will impart an intermittent rotary movement4 to the ratchet 106 and to the carrier 107 with its arms 90, 95 and 96,1thus carryingthe fhe'els to the different cutting mechanisms ALB, y

and D, Fig. 1.

A plate 108 is fastened to the upperrrend of each of the work supports 52 and rthese plates are provided with prongs 109 which stick into one face of the heel 23 andthe heel is held firmly pressed against the plate 108 by a clamp plate 110 rotatably supportedon arm 111, comprising as a whole the presser foot 53. The arm 111 isfastened to avertical rod-112 which is slidably mounted in a bracket v113 fast to the arm 90.`

I The work support and presser foot are Vduplicated on eachA of Athe arms 90, andv 96',

therefore a descriptionofone of these ,de-

vices will apply to all three.

YfA'spring 114 encircles the rod 112 and acts to force-the presser foot 53 downwardly. It is held upwardly against this downward pressure vby a latch 115, Fig. 16,v which is provided .with two'teeth 116 and 117. The

latch 115 ispivoted to a stud 113 which is fastened to the lower end of the rod 112 and Vprojects laterally therefrom, see Fig. 7 The latch 115 is provided with a lateral prei ection 1-19 which,y as the cam 46 is rotated' inthe direction of the arrow 71, Fig. 6, is rocked to rock the latch 4115 to disengage the tooth 117 from'engagement with a plate 120 fast to the l 7, which is pivo-ted at'122 to a plate 123 which, Vin turn, 'is pivoted to a stud 124 fast to they l' cylindrical bed plate 100, and the plate 123 v wardly therefrom, see Fig.

is rockedupcn the pivot 124-by a cam projection 125 projecting from the periphery of the cam'46, and as said cam is rotated in the direction of the arrow e', Fig. 6, this projection engages af roll 126 mounted on a stud 127 fast to the plate 123 and prciecting down- 7 The lever 121 is held normally in the position illustrated in Fig. 7 by a spring 123, one end of which is fastened to the lower end of said lever121, the other end being fastened'to the stud 127. Y

vThe carrier, during the clamping Vof the heelfto the presser foot,'is locked in position by an armV 129, see Fig.'6, which is piro-ted to a stationary stud 130 fast to the bed plate 100 This arm is held normally against a stop screw 131 by a torsional spring 132 and it has an upwardly extending plate 133 fast thereto, and having in one edge thereofa notch 134 which engages a vlocking plate 135 fast to the arm 90. One of these locking plates 135 is providedupon each of the arms: 90, 95 and 96. The plate 129 is provided wi'tha cam roll 136 rotatably mounted 'thereon and adapted to engage a. cam groove 137 on the periphery of the cam 46. As shownin FigfG the arm 90 is locked by the arm 129 as the locking plate 135 is projecting into the notch 134 on the plate 133.

As the cam 46 rotates in the direction of the arrow z', it will be evident that as the roll 136 rides out of the cam groove 137 the arm y 129 will be rocked in the direction of the arrowh, Fig. 6, and the' locking plate 135Y will be disengaged lfrom the arm 133. Now the carrier 107 vwill be free to be rotated by the pawl and ratchet mechanism, hereinbefore described, carrying the heel 23from the position m, Fig. 17, to the position w, where substantially the ksame radius, and upon continued rotation of the carrier 107 the heel iS swept along said guide plate past a pair `of rotary cutters 139 Aand 140. These cutters are fast to rotary shafts 141 and v142 parallel its breast `portion is brought into'engagement with an arcuateV guide plate.138, Fig. 1, of-` to' each other and rotatably mounted in bearings 143 and 144, see Figs. 9 tof 11 inclusivev respectively. The shaftf141 has a spiral gear 145 fast thereto. gear 146 fast thereto, and these two spiral gears mesh into other spiral gears k147 and 148 respectively. The gears 147 and 148i have their teeth reversely inclined, so thatl they rotate the shafts 141 and 142 in oppositev directions relatively to eachv other.v The gears 147 and 148 are fastened to a rotary shafty 149 to which rotary motion is impart#l ed by a flexible shaft 150 rotated by gear mechanism 151 to which motion is imparted by a pulley 152, Fig. A1. f

In order to ad `ust the. shafts 14-1 and 142 toward or away from Veach other, the bearings 143 and 144 are slidably mounted in a bracket 153 and have screw-threaded en.-v

gagement with a screwr154 which is screw threaded at 155 and 156 to engage nuts 157 and 158 respectively, these nuts being positioned in slots 159 and 160 in the bearings ingthe screw 154 the bearings may be drawn toward each other or moved apart. The

The shaft l142 has a spiral screw 154 is rotatably mounted vin another screw 161 which has screw-threaded vengagement with thek bracket 153, so that by rotating the screw 161 both of the bearings 143 and 144 may be simultaneously-adjusted .to change Athe relative location of the cutters 139 Iand. 140 to the face of the heel 23. Thev also supports the guide plate bracket 153 It will be noted that the axes of the cutter Yshafts 141 and 142 are inclined at anangle to the ktread of the heel 23 and as ,shown in Fig. 9 vthe vfin 21 on the heel 23 is brought; into yengagement with the cutters and sep` arated therefrom, -this being the fin von th lower edge `of the breast of the heel.

YThe cutters 139 and 140 are heldin en` gagement with the lower'edge of the heel 23 by reason ofthe fact that the bracket 153 is.

moved toward the heel by a spring162, one end of which is fastened to a plate 163 fast toa 'stationary bracket 164 which, in turn, is fastened to the stationary bed plate 100. The bracket 153 is slidably mounted in ways 165 on the upper end of the bracket l164 and the spring 1'162 .isfastened at its outer Vend to .anarm .166 which is fastened tothe bracket Astop 167 is provided to limit the distance to which the cutter bracket 153 can .be moved inwardly or towardthe center of the bed plate 100. l

The arrangement is such that as the car-v rier 107 sweeps the breast portion of the heel along the guide lp'late 138 past the cutters-139, 1410, thecutter mechanism as a Whole vis forced Arearwardly against the tension of 'the spring'1'62. The` heel is thereby turned from lposition w to position o (see Fig. 17), since the holder 52 is free vto turn pivotally at `.position A.

'llheiin having nowtbeen trimmed from the lower edge of the breast of the heel, the -heel'lis lneX'tcarr-ied to the cutter mechanism B, Figs. 17, 1.2and 13. These .cuttersV re- VA.move the flower fin-from the ropposite sides fof Athe heel land from the circular rear end portion of the heel, and the Vheel is brought to `the lcutters from the position o, F ig. "17

-tothe position u. lt isturned `from the position iv to the position u by the combined ac ltion o'f the guide plates 168 and 169, Fig. 1. The guide plate 168 is' engaged 'by the roll 91 on the arm 90', which is fastened to the Work support 52, so that as this roll is rocked by V'engagement With-the guide yplate 168 it turns the Work support 52 into the proper position for one side u of the heel 23, see Fig. 1'7, to be properly positioned by the coaction Iof the roll` -91 With the guide plate 168 and the coaction 'of the side ofthe heel with the plate 169 to properly position the `heel to be engaged by the cutters 17 0 and 171 of the cutter mechanism B.

It is unnecessary to enter into a detailed description ofthe mechanism by Which-theV cutters 170 and 171 are rotated as it is the same as the mechanism whereby the cutters 139 and v are rotated. The'only difference between the two cutter mechanism A and B is that the guide plate 169 iscf different shape than the guide plate 138 andthe bracket 153 is slid-` -ably mounted on a slide Vframe 172 so as to slide Itoward the heel, and the slide frame 172 is slida'bly mounted in Ways 17 3 on al bracket 174 fast to the bed plate 100, so ithat thecut- Aters and 171 are urged toward the heel by the spring 162 and they are moved tangentiallly relatively tothe heel by-tlie slide 172,.

and this tangential motion is imparted by mechanism hereinafter described.

Referring now to Fig. 17. The heel is moved `from the position u lby the motion of the carrier 107 in the direction of the arrow mi. The carrier then comes to a stop and the 4heel is given a half rotation by the Work support 52, as illustrated in Figs. 12 and 13, and

the Work support52 is rotated by a gear 175 which isfast to a shaft 176 rotatably mountedA vina bearing 177` in a bracket 178 fast to' the Y ibed of vthe machine. The upper end of :the

,JSA

shaft 1761s ilatted oli' transversely thereof `at 179 and the flattened'surfacey 179 engages the flattened v*surface 93 on the Varm '90', so that y when the gear 175 is rota-ted a half rotation a likerotation will be imparted to the arm 90 :70 and to the Work support 52 to which it is fastened, .thereby imparting a half rotation to the heel 23. Although the shaft 1.(6isso positioned inthe orbit of the arm 9.0 that its portion Y93 of said arm, the half rotation of the shaft 176 reverses 'the positions ofthe flatted members `so that the arm 90 is freeflto move away from the shaft 176 upon continued movement ofthe carrier 107. i i ,t

The gear '175 is rotated 'by a rack 180, Figs.

flattened portion 179 engages .thelflattenedqi5 1 and 2, with Which it is .in mesh and the rack l' 180 is fastened toa-.slide 180'slid`ablymountf ed in Ways 181 on lthe bedplate of the machine A and has a reciprocatory motion imparted thereto -by a 'gear 182 which meshes with a-'rack A 182 on the slide 180. The gear1182V is rocked by a segment gear 183 on a lever 1.84 `Which is pivoted to a stud 185'on the bed plate ofthe machine and is rocked by a cam roll 186 which engages a-cam path 187 vin the cam member 46.

This lever 184 also imparts arocking movement to the gear`101 vby meansrof a segment 188' forming a portion thereof, which meshes with vthe gear 101 and thus imparts-an nter-v 355' 4 Vmittent rotary Vmovement to the carrier, as hereinbefore described, throught thel pawl land ratchet mechanism.

When the iinis being trimmed from the circular rear portion of the heel a rotary motion must be imparted lto theheel and at the Sametime a tangential motionimparted to the cutters relatively to the edge ofthe heel for the reason that the contour Vof the rear portion of theheel is not an exact circle and this combinedrot'ary movement of the heel 'fino o and tangential movement of the cuttersrelatively to the heelis obtained by rotating the heel, `as hereinbefore set forth, and at "the same time moving` vthe cutterstangentially relatively` to the heel-by sliding 'thebracket nism hereinafter to be described.VA i

l/Vhen the heel has'been trimmed on the side .i

a and on the circular rearl portion, the, op-

posite side of the heel `from theside'l'u/Qis trimmed by the movement of the heel through its carrierand Work vsupport inthe genera-l direction of the arrovvm vuntil the heel arrives atthe position t, F ig. 17. The` heely is now moved bythe carrier to the cutte'rmechanismC andthis mechanism 'is substantially the same as the cuttermechanism A except that the cutters 189 fand190'are inclined at a different angleto thetread lof the heel, v so l that they may-beengagedbythe upper edge f Ycutter mechanisniA. The operation of trimheightrelatively to the upper face of the heel I ,upper-edge is the same otherwisev as that by means of a rackl 191 which is fastened to vthe bracket 153 and is slidably mounted upon a'bracket 192 which is fastened to a slideI 193 slidably mounted in ways 194 on a bracket YK195 fastto the bed plater 100. v The bracket 153 ismoved upwardly or downwardly for the purpose specified by means of a pinion i196 andlocked in position by a clamp handle 197 and plate 198, similar-to the constructionr hereinbefore described, whereby the guide `plates'54 and 55 are y'adjusted-and locked in vposition. 4The cutters 189 and v190 are urged 'toward the breast portion of the heel by means of a'spr'ing 199, thesame as in the form of Vming the -heel along the breast and on the described in relation to the operation of the cutter vmechanism f Y y A After trimming the upper edge of the ,breast ofthe heel,'the heel is carried to the 'cutter mechanism D, which is substantially the Ysame as the cutter mechanism B `and operates in substantially the same'manner eX- ceptthat the cutters are inclined as in the fcutter mechanism C andthe vertical adjustment ofthe cutters relativelyto the heel is the same as in the cutter mechanism C. The cutter mechanism D hasa transversely movable slide frame 172 to impart the tangential movement of the cutters relatively to the heel while the' circular rear portion'ofithe heel isbeing trimmed, and a reciprocatory motion is imparted to this slidemframe 172 by a lever 200 which is pivoted` at 201 to the 'fbed plate of the machine and has a rocking motion'imparted thereto Vby a cam roll 202 K positioned in aL cam path 203 in the top of the cam member 46.` This rocking motion is conveyed from thev lever 200y to-the slide framef17 2 by a bracket 204 which is fas- Y `tened thereto and is provided with a stud'V 205 whichprojects downwardly therefrom into a slot 206 in the` lever 200. The stud 205 is adjustable longitudinallyof` the slot 206 in order that different throws maybe imparted to the slide frame 17 2. The slide Vframe172 is connected byalink 207 to: a bell-crank leverr208 which is pivoted at 209 to the bed plate of ythemachine and is ccnnected byanother link 210 to the slide frame KY17' 2 of the'cutter mechanism B. The link 210 by f a" turn-buckle construction is rendered adjustable longitudinally thereof in order to initially position the slide frame 172. 1 YIn'the cutter mechanism D the work support 52 is rotated in the same manner as in rthe cutter mechanism B except that thearm 'l -90 andthe work Vsupport `-te.r which it is attached are rotated by. aV gear 211, Fig. 2,

instead by the gear 175. `The gear 211 is rotated by a rack 212 fast to theslide 180'.;

As the heel 23 iscarried from the cutter. mechanism Blto the cutter mechanism C` the roll 91 engages a cam plate 213 and thisrocks the arm and the worksupport 52 and brings the heel into approximately the position 8, Fig. 17, inreadiness to engagethe vguide plate 138 in the cutter mechanismC, i* and as the heel is carried to the cutter mechanism D the roll 91 engages the cam plate 168 and the heel engages the guidegplate-.169 whereby the heel is guided to the position r from the position s', which it assumes as it .leaves the guide plate 138. (See Figs'.V 1V

As the heel isbeing trimmed by the cutter mechanism D, which as stated is substan- The fins having beennow'trimmedfrom. i

theedges of theupper andlowen faces of the heelf'the heelis'carried forward bythe carrier 107 from lthe position ofte the position n and lin passing from the position 0 to to the position `n the presser foot 53 is lifted out Yof engagement withl the heel 23by a cam 214 which is shown in Fig. 1 andy also in dotted linesin Fig. 7. This cam engages a p roll 215 which is r'otatably'mounted on the -stud 118. `The roll is moved upwardly by the cam 214 and this moves the rod 112 upwardly thus raising the presser foot'53 out` ofengagement with the heel 23 and at the same time the latch 115 is raised, the same beingmounted upon the 'stud'118, until the tooth 117 on said latchis raised above the top ofthe plate 120, whereupon a flat spring 216 rocksethe latch untilthe tooth 117 engages the upper face of the plate 120 which holds the latch against downward movement of the rod 112 and the presser-foot. v f y The heelnow rests upon the work support without anypressure thereon andis free to be stripped frcnrthe work support, which is done by the stationary stripper plate 217, Fig. 1. 'The heel after being-stripped from the work support falls uponV anY inclined chute 218 and slides down said chute and into a suitable receptacle'.L Y

Upon continued movement by thercarrier` 107 the work support is now brought'in position to receive anotherv heel, that is, to the position` illustrated in Fig. 1, and as the carrier moves to this pcsitionithe Yroll 91 first engages the cam face 219 of a cam Vplate220. and subsequently 'enters a cam path -221 "formed upon said cam ,plate 220.. hen'the carrier comes to a stop as illustrated in Fig.

1, it is therefore ready to have anotherheel fed toit inthe position fw, Fig. 17, .as herein- .before described in relationto the positioning of the heel 23. As the carrier approaches the position where a new heel is fed .tothe presser foot, the locking plate 135 engage the 'rounded end of .the plate 133 and pushes it erations hereinbefore described, vand espev cially while the work support is being rocked VAtofbrino' the heel `into Vthe correct osition with relation to the cutters, as for example, in passing from the-cutter mechanis1nA to the cutter mechanism Bv, or from the cutter mechanism B to the cutter mechanism C, or from the cutter mechanismrCto the cutter mechanism D, there is apossibil'ity `ofrthe `arm 90 and work support beingrocked accidentally by arring or the like to assume undesirable positions and to guard against this eventuality a vpairof detents and V223 are provded,`F ig. (i. These detents are pivote'd at 224; and at 225 respectively `to a crossbar l226 which is fastened to the underside'of 4the arm 90.` Aspiring227 is connected at its opposite ends to the detents 222 and and draws them toward eachother luntil the .inner edges of said detents engage flattened rsurfaces 228 and 229 von the cross bar 226. This construction limits the Adistance to which the Vdetents 222 and 223 can be drawn toward each other and positions them with relation to the roll 91 and the arm 90" upon which'itA is mounted as well as the work support 'Lo Vwhich the arm 30 is fastened. 1f there is Vany tendency for the arm 90" andparts connected thereto to be accidentally moved outof position, as hereinbefore set forth, the rarm v90 will engage the inner `edge 230 of the y detent 223 which will apply frictional resisthave a new heel fed thereto the lateral pro-` liection 119 on the latch 115` will engage the bevelled surface 232 on t-he lever 121and the' lever w'illfberocked toward the right, Fig. 6,

Y posite sidesand around thecircular portion.

` The heelis then carried to the positions i-luntil said lateral proj ectionpasses'by, A'wellen said lever willbe brought aga-inytopthe'posil tion illustrated inFrigiG by atheaction .ofthe spring 129. A

The slide 28 has a recess ,235 i'n-itsunder-.UO face having yoppositely inclined faces, .anda ball236 is positioned in whole-1237 yin the bracket `25. A spring `238 holds the vball upwardly in the`recess-235.v rIf `when `theheel 23 is brought forward to engage .the gude''75 plates 54 and 55, it should ,engage one .ofthe plates and not the other, the slide 28 would Vmove in one direction or the other so that fthe heeiwould contact with both of said guide plates, and when 'the bracket 25 is retractedi80 the'ball 236` and spring 238 would -operatei to lreturn the slide 28 to its normal position.`

The general operation vof the mechanism hereinbefore specifically and to aplarge eX- tentpin general described is as follows 1 "33:5 The lowermost heel 23 in a stacl of heels f 1s fedby the mechanism illustrated in'rFigs.

3 and 6 from the .position Fig.y 17, to .the f position f The heel is fed between a work Support 52and a .presser foot 53f'on'onev yofi-:30

the arms 90, 95 or 96, according,tothefposition of the carrier`107. The, heel` is positioned by the `feed mechanism withts rounded portion bearing againstthe plates :54 and v 55 and is held in vthat position by thelinger"l5 68 which bears against the breast ,of the `:heel and 'is broughtto bear against'zthe lbreast i g ofthe heel by the mechanism herembefere n described and illustrated in Figs. 3,4 andft. The carrier 107 is at thistime locked in posi- 30G .tion by ,the mechanism hereinbefore described and after the 'heel is positioned and clamped to the work support bythe presser foot, the carrier arm vis unlocked,-the carrier is rotated by the pawl andr ratchet mechanism il- "505 lustrated in Figsfl and 3 tothe ipositionfw,y

the positioning of lthe Vheel being assisted by the `guide plate 138' of 'cutter mechanism A.' The cutter mechanism A trims'the iin from 5 the lower edge ofthe breast of the heel. 5110 The heel is carried forward by thecarrier 107 to the position aand :is'carried through the three different positionsv illustrated in Fig. 17, where the heel 'is trimmed on `the .op- H5 Theheel is then carried to the position s and s Wherethe finis trimmed fromthe upper edge of the breastl of the heel by the cutter` mechanism C. i y

lustrated in connection with the cutter mechanism D, that is,r, p, and 0,.-and the fin is trimmed from its upper edgeon the "opposite sides and the circular rear portion of the heel. The heelis then carried to the position n 5' where it is removed from the machine and the Icarrier-then moves to thepositiongtoreceive another heel -in the position av', Figflf?. Y Since the breast 'of-the heel Vis trimmed being swepty past the/,cutting mechanisms A 'and' C, and the heel isremoved from the machine by the movement of the work-support Ypast the stationary stripper plate l217 it wil bevobvious that the carrier lOZis so indexed thatl pauses inits movement occur only when the work-'supports 52 are at the loading sta-k tion, and trimming Ystations B and D. A

While inthe foregoing specification and in the drawings the cutters have been illustratedV and described as a pair of rotary cutters, and while Ithis is thestyle of cutters which it is preferable to employ, still a pair of cutters such as illustrated in Figs. v18 and-19 may he Lutilized without departing from the spirit of my invention.

. Referring-to Figs. 18 and 19,v 233 is a rotary cutter and 234-. a stationary cutter coacting therewith. These' cutters when employed Vin the position oi the cutter mechanisms A and Bvwill be tipped at an angleto trimming the' iin from the lower edge of the heel as illustrated inY Fig. 12, when 'taking the' place of the cutterv mechanisms C and D the cutters 233 and 234 will he tipped to trimv the y jing automaticV means for mounting the heel upon the work holder.

3. In a heel-trimming machine the combination of a. series of trimmer units, a workH holderV adapted to receivek a shoe licei convey it successively tothe several trimmer units, and'meansv for turning' the heel on the work holder so as to cooperate with particular trimmer` units in the trimming-of the kheel. Y f

4:. A machine as defined in claim 8 in which vthe movement of the work holder is intermittent andV the work is turned thereonduring a pause in'its movement. f Y v 5. In aflieel trimming machine the coni'- bination of a series of trimmer units, a work holder adaptedv to receive a shoeheel and convey it step by step successively yto said trimmer units to he partly trimmed thereby during apausein the movement of Ythe work holder, and a series of trimmer units` positioned intermediate the units of' the iirst mentioned series adapted. to trim portions of. the heel as it is carried from' one to another of said first-mentioned units.

-6 Ina heel trimming machine the combination' of Va trimming mechanism Ymovable as a unit, afworli holder adapted to receive a shoe heelpand convey it stepriby step tovsaid trimming mechanism, means for. trimming the heel on the worksupport inctimed rela-V tion tothe movement of trimming mechanism, and'means for coordinating the movements of the trimming mechanism and theV work holder to eiiect ythe trimming of a margin ofthe heel. i

7 Ina heel trimming machine, the combination of a pair of .spaced apart trimming units, work holding mechanism adapted to? sweep the heel past the first trimming unit to remove the rtin from the breast of` said heel, and to carry the heel Vtoward the second trimming unit, and means anterior to said second unit for turning the heel s0 thatan un- Itrimmedr margin of the heel is'presentedl to the latter.'Y y

v8.y vIn a heel trimming machine the coinbination of a pair of spaced apart trimming v units, a work carrier adapted to sweep a heel ypast the first trimming unit to remove the fin from the breast 01"' the. heel, and to convey the heel to the second trimming unit, and means forV turning the heel upon the carrier device while it is in engagement with the second trimming unit to trim another margin of the heel.

Y 9.v A heel trimming machine as defined in claim 8 including means for causing the work 95 carrier to dwell while Vthe work is turned thereon at the second trimmer unit.

10. 'In a heel trimming machine the` combination of a cutter, a work holder adapted to conveyv av shoe heel in a fixed course pastk the cutter, and guiding means associated with the cutter adapted to engage the breast of the heel toguide the latter into engagement with the cutter.

11. ,A heel trimming machine as defined in claim 10 including ayielding support for the cutter.y Y

12. Ina heel trimming machine the combination of a cutter, a carrier moving in fa iiXed course-past the cutter, and a work holdker Vpivotally mounted for planetary'movement on said carrier.

13. In aheel trimmingV machine the com-KV bination of a cutter, al carrier moving in a yii-Xed course past thecutter, a work holder pivotally mounted upon theV carrier and adapted to support a shoe heel, andguide means associated with the cutter adapted to eiiectvfeedingof the breast of therheelpast 'the vcutter in a courseparallel to the breast of the heel. f

14C.- A heel trimming mechanism as defined in claim 13 including a yielding mounting for 'theV cutter.

15. In a trimming machine the combination of a rotatable work holder, means for K' securing a shoe heel thereto in a position intersected by the axis thereof, means engaging the Vwork holder to rotate the same upon its axis, and a rotary cutterv Vmechanism mountedfor movement'relatively to the heel for trimming a portion of the heel as it is rotated by the Work holder.

16. In a trimming machine the combina?l tion of a rotatable Work holder, means for securing a shoe heel thereto upon the axis thereof, means for imparting determinate rotative movement to the Work support to turn the shoe heel thereon, a cutter normally yieldingly urged toward the shoe heel, and means for moving the cutter transversely of the direction of its yielding movement.

17. In a trimming machine the combination of a plurality of trimming devices, a carrier, a Work holder sWiveled thereon, means for advancing the carrier step by step with pauses only at alternate trimming devices, and means for imparting determinate rotative movement to the Work holder during the pauses of the carrier While permitting said Work holder freely to turn While the car-V rier is in motion. y

18. In a trimming machine theV combination of a carrier adapted to be moved step by step, a Work holder mounted for rotary movement on said carrier, a trimming device normally urged toward the carrier and adapted to be moved in a direction transverse to said normal urge, and means for indexing said carrier, rotating the Work support thereon, and eiectmg transverse movement ofthe trimming device in determinate timed se-Vv quence.

In testimony whereof I haveyhereunto set my hand,

MALCOLM S. GATE. 

